The Longacre water temperature gagelite Kit is designed to warn you that something is wrong before the damage is done! Not all cars have the space to fit a gauge for every eventuality and they can also be added safety net to gauges, so these gagelite kits are ideal for numerous purposes.Sender unit is switched at 110 degrees C (230 degrees F)Kit includes sender (1/2'' or 3/8'' NPT), light, wire and terminals for a complete, easy installation